package com.young.mylib.view.button;

import android.animation.ObjectAnimator;
import android.content.Context;

import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.ViewGroup;


import com.google.android.material.floatingactionbutton.FloatingActionButton;

/**
 * Created by Young on 2018/5/21.
 */

public class DragFloatActionButton extends FloatingActionButton {
    private final static String TAG="DragFloatActionButton";

    private int parentHeight;
    private int parentWidth;

    public DragFloatActionButton(Context context) {
        super(context);
    }

    public DragFloatActionButton(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public DragFloatActionButton(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }
    private int lastX;
    private int lastY;
    private boolean isDrag;
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        int rawX = (int) event.getRawX();
        int rawY = (int) event.getRawY();
        switch (event.getAction() & MotionEvent.ACTION_MASK) {
            case MotionEvent.ACTION_DOWN:
                setPressed(true);
                isDrag=false;
                getParent().requestDisallowInterceptTouchEvent(true);
                lastX=rawX;
                lastY=rawY;
                ViewGroup parent;
                if(getParent()!=null){
                    parent= (ViewGroup) getParent();
                    parentHeight=parent.getHeight();
                    parentWidth=parent.getWidth();
                }
                break;
            case MotionEvent.ACTION_MOVE:
                if(parentHeight<=0||parentWidth==0){
                    isDrag=false;
                    break;
                }else {
                    isDrag=true;
                }
                int dx=rawX-lastX;
                int dy=rawY-lastY;
                //这里修复一些华为手机无法触发点击事件
                int distance= (int) Math.sqrt(dx*dx+dy*dy);
                if(distance==0){
                    isDrag=false;
                    break;
                }
                float x=getX()+dx;
                float y=getY()+dy;
                //检测是否到达边缘 左上右下
                x=x<0?0:x>parentWidth-getWidth()?parentWidth-getWidth():x;
                y=getY()<0?0:getY()+getHeight()>parentHeight?parentHeight-getHeight():y;
                setX(x);
                setY(y);
                lastX=rawX;
                lastY=rawY;

                break;
            case MotionEvent.ACTION_UP:
                if(!isNotDrag()){
                    //恢复按压效果
                    setPressed(false);
                    Log.i(TAG,"getX="+getX()+"；parentWidth="+parentWidth+" getwidth: "+getWidth());
                    float num=parentWidth-getWidth()-getX();
                    Log.i(TAG,"getX= "+num);
//                    if(rawX>=parentWidth/2){
//                        //靠右吸附
//                        animate().setInterpolator(new DecelerateInterpolator())
//                                .setDuration(500)
//                                .xBy(parentWidth-getWidth()-getX())
//                                .start();
//                    }else {
//                        //靠左吸附
//                        ObjectAnimator oa=ObjectAnimator.ofFloat(this,"x",getX(),0);
//                        oa.setInterpolator(new DecelerateInterpolator());
//                        oa.setDuration(500);
//                        oa.start();
//                    }
                }
                break;
        }
        //如果是拖拽则消s耗事件，否则正常传递即可。
    //    return !isNotDrag() || super.onTouchEvent(event);
        return  super.onTouchEvent(event);
    }

    private boolean isNotDrag(){
        return !isDrag&&(getX()==0
                ||(getX()==parentWidth-getWidth()));
    }
}

